Berkey water filters are one of the top brands in water purification worldwide. They depend on gravity fed water purification; they remove viruses, harmful pathogenic bacteria, cysts, parasites, unhealthy contaminants and impurities to below detectable levels, while leaving in the essential minerals your body needs. The result is healthy, delicious water. Berkey systems are one of the most economical water purification systems too. The long life of the Berkey Purification elements allows you to enjoy purified water for much less than bottled water. Berkey systems can easily purify ordinary tap water, yet are powerful enough to efficiently purify raw, untreated water from sources such as remote lakes and streams. Berkey systems are easy to assemble and operate without tools, electricity, water pressure or plumbing.